Process of producing bituminous binders and compositions.



i no, 915,260.

Wytheville, in the county of W the and v UNITED STATES: PATENT oFmo WALTER s. WILKINSON, OF WY HEVILLE, VIRGINIA.

PROCESS OF PRODUCING" BITUMINOUS IBINDERS AND COMPOSITIONS.

To all whom it may concern: a v. 1 Be it known that I, WALTER S; WILxI soN, a citizen of the United States, residing at State of Virginia, have invented an mpro'vement in Processes of Producing Bituminous Binders and Compositions, of which the following description, in connection with the accompanying drawings, is a specification.

My invention relates to the rocess of'pro- (lucing bituminous binders and compositions.

In the making of such briquets, 1t is common to mix the coal or other body material with a cementitious'agent, usually one of the bitumens,'for the purpose of unitingthe particles of. body material in condition for use, and itis of coursees sential for thebest results that this binder be distributed as com pletely and uniformly as possible throughout the mass, in order that it may serve most efficiently as a binder and also in order that the smal est possible amount ofbinder be required, because it is usually the most expenslve elementof the mass. P Heretofore it has been common in the makingof such, briquets to mix the bitumenin a llquid'c'ondition withv the comminuted body material, such .as coal, but it has been found impossible fully or uniformly to distribute a liquid bitumen through a mass of comminuted solid material such as coal.

been attempted to-mixthe bitumen in a hard- Ithas also land dry state with the .comminuted body asolid state, but'usin 'material, but hereag'ain it'has been found impossible -to obtaina thorough and uniform dry mixture of the particles, while by both of these methods a lar er percentage of binder is necessary to maEe a "good briquet than by'myprocess. I

My invention comprehends the introduction of the cementitious a ent or bitumen in owever, a liquid vehicle as a means for ist lributing the solid particles fully and uniform y throughout the mass of body material. g In carrying out my invention I emplo coal tar pitch, water gas pitch, or any similar or equivalent bitumen'bearing cementitious solid, and by'grinding or otherwise I subject the same to an enforced mixing in a finely comminuted state with water or some other liquid in which it, is not soluble. In this manner, I form a fluentmixture which may be handled with all the facility and advantage of a liquid, but which nevertheless bears the cementitious material in asolid though" Specification of Letters Patent. Application filed Ju1y27, 1906. Serial Nb. 328,016.

very

Patented March- 16. 1909i tion.

.The body material, for instance, coal a a sufficiently comminuted condition, is now finely divided or comminuted condimixed inany suitable manner with this fluent cementitious mixture, or the said eementi-L' tious mixture may be incorporated with the comminuted body material 1n any suitable or desired manner. I have found the usual pug mill s'uflicient for this purpose, and after the body material and cementitious mixture have'been thoroughly incorporated or mixed, it will be found that the particles of pitch, (that is .tosay, the solid cementitious par- .ticles) have been carried by the wateror other vehicle completely and ,uniforml throughoutthe entire mass of body materia being "deposited in the smallest and most minute interstices between the particles of body material and man extent and with a with the methods or processes. heretofore 'commonl used or known tome.

In ma ",9; an ordinary coal briquet- I uniformity that has been quite impossible produced excellentresults, although; of 7 course this proportion maybe varied more or less according to the usual varying condi- Ihave been able by m process to produce commercial bri uets with from 5% to 5% of coaltarpitc that contains 66% ofbitu men, so that the resulting briquet contains onlyfrom 3.3% to;3, 63%of bitumen. I

The 'fluent' mixture produced as above stated by grinding the pitch in water isap; V

wfiarently a permanently fluent mixture. I

ave found two or more parts of Water to one part of bitumen or bitumen bearing material to produce excellent results.

mixture to contribute greater'strength where necessary or desired, or any other equlvalent or suitable material for the purpose.-

A small petcentage of'lime may be added to the fluent After the body material has been sufli ciently and properly mixed with the cementitiou'smixture, the'r'esultant mass may be stored or accumulated before being furthertreated, or it may be at once heated to evaporate or dispose of the li uid which was employed merely as a'vehic e for the distr1bution-of' the .cementitious' agent throughout 7 the body material and to melt the particles I of pitch After this has been done, the mass is t en pressed into desired form for commercial use, and under such pressure or other 1. The process of making coal or other briquets which consists in mixing a bitu' men bearing cementitious solid in a finely comminuted state with a liquid wherein it is not soluble to form a fluent mixture; inti- 'mately the same with comminuted briquet material and then drying, heating and pressing the resultant mixture,

2. The process of making coal or other briquets which consists in grinding pitch in a llquid such as water to form a fluent mixture,

intimately incorporating said mixture with comminuted briquet material, thereby dis- ,tributing said ground pitch, in its solid state, throughout the briquet material; and drymen bearing cementitious solid in and with a liquid wherein it is not soluble, thereby to produce a flu'ent mixture containing said cementitious material in a solid state for distribution-purposes.

4. The process of making a binder which consists in grinding pitch in water to such a degree of fineness as to roduce a fluent itch containing mixture which may be readily distributed.

. In testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

WALTER S. WILKINSON. Witnesses:

FRED GORLIOH, KATHARINE A. RILEY. 

